Additional for Mini and LCD:- IR Sender (for some protocols)- RTC (Real time clock) for programmable wakeup with GoldCap buffer for min 3 days in case of an power failure.- i²c Header for extensions (FAN Controller) (Mini from Rev04)

Additional for LCD Version:- Up to 15 push buttons (up to 255 if you do not need the Rotary encoder)- Rotary encoder with separate push Button- LCD for character and graphic LCD with controllers: HD44780, KS0108, T6369C- Automatic back light adjustment via Photo resistor if LED back light is used.